等面积不同形状截面梁弯曲性能实验研究  

Experimental Research on the Bending Properties of Beams with Different Shapes and Equal Cross-sectional Area

作　　者：杨婷[1] 邓宗白[1] 张剑[1] YANG Ting;DENG Zongbai;ZHANG Jian(Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

机构地区：[1]南京航空航天大学

出　　处：《新技术新工艺》2019年第10期72-75,共4页New Technology & New Process

摘　　要：对截面面积相等但形状不同的梁的弯曲性能做了研究,通过理论分析和实验数据比较它们的抗弯能力。实验是通过定量测定等面积但不同形状截面梁的弯曲变形位移分量,即通过比较挠度、转角以及弯曲应力的大小来比较各种梁的抗弯能力。从实验结果可以看出,各种不同形状的截面梁,尽管其截面面积相等,但抗弯能力却不相同,惯性矩越大,抗弯刚度越大,则弯曲变形越小,挠度、转角和弯曲应力都越小,说明其抗弯能力越好。The bending properties of various beams with the same section area but different section shapes were studied, through theoretical analysis and experimental data, their bending resistances were compared. The experiment was to quantitatively measure the bending deformation and displacement components of beams with equal area but different shapes, which means by comparing the deflection, angle and bending stress, the difference between bending resistance of various beams was obtained. Thus, it can be concluded from the experimental results that although the cross-section area of various shapes was the same, the bending capacity of beams with different section shapes was different. The bigger the moment of inertia, the bigger the bending stiffness, the smaller the bending deformation, and the smaller the deflection, angle and bending stress will be, which indicated the better bending capacity.

关 键 词：力学实验 实验装置 弯曲实验 电阻应变电测 工程力学 材料力学 

分 类 号：G642[文化科学—高等教育学]